Question

find the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicularfind the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicular​

Answer 1

Answer:

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Answer 2

Answer:

m = - 4 / 2 = - 2 , 8 / 2 = 4

Explanation:

Given : find the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicular find the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicular​

To find : find the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicular find the value of m such that a=mi-2j+k and b=2mi+mj-4k are perpendicular

Solution : ​

a⋅ b = o

2 m ² - 2 m - 4 = 0

m = 2 ± √ ( 2 ) ²- 4 6 0 ) ( - 4 ) 2 ( 2 )

=2 ± √ 4 + 3 2 / 4

= 2 ± 6 / 2

m = - 4 / 2 = - 2 , 8 / 2 = 4

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